Verstappen has won all three previous sprint races this season and has won the main race in Austin the last three years. But he hasn't won this season since the Spanish Grand Prix on June 23 and has earned just three podium finishes in that span. Verstappen at times has described his once dominant car as “undrivable” and a “monster.”

In his column ahead of the United States Grand Prix, F1 correspondent Daniel Moxon ponders how important Red Bull's Austin upgrades will be for Max Verstappen's title defence

Lando Norris believes the Formula One drivers' championship battle could shift in his favour after Red Bull were made to alter a controversial ride-height device found in their car.